公共英语二级模拟2f

E 　　A wind tunnel¹ (风洞) is used for teasing² planes or plane models. In a wind tunnel air is blown over a plane or a model placed in a test section(区).Wind tunnel test sections are different in size depending on airflow speed requirements³. Some low-speed tunnels⁴ have test sections large enough for a complete small plane. In the very high speed tunnels used for space testing, however, the model may be as small as a pencil. 　　There are two ways of feeding air to the test section. In the constant⁵ flow tunnel, airflow is produced by electric fans. It is forced through the tunnel to the test section, then through another tunnel section back to the starting point for reuse⁶. The other way involves (卷入) storing high-pressure air in a box, sending it out by a controlling device(装置) to pass through the tunnel and test section into another box. This way is usually used for a very short period of high-speed airflow. 　　Wind tunnels are usually used to test planes before they are flown. Problems in a plane can be found when it meets the high-speed airflow in the tunnel. For example, if the wings are built so that they would weaken(become weak) at high speeds, this fact can be discovered in the tunnel, saving⁷ many lives and millions of dollars. 　　In a wind tunnel, scientists also find out how different planes will act different speeds. They find out such things as how the air dives by the wing surfaces, how slowly a plane can fly before it starts to drop, and how fast it can climb.

  52. Some wind tunnel sections are larger than others because ________.  

A) they are used large planes   

B) stronger wind can be produced in them    

C) they are built to meet a higher speed test   

D) the wind used in them flows at a lower⁸ speed   


  53. Which of the following shows the right way of feeding air to a wind tunnel section usually used for a high speed test?
( ← = wind flow  = test section)

54. “This fact” in paragraph⁹ 4 of the text refers to _______.  

A) the wing are not good enough   

B) it costs a lot to test a plane    

C) some problems are found with the plane   

D) many people will die in a plane accident   


  54. “This fact” in paragraph 4 of the text refers to _______.  

A) the wing are not good enough   

B) it costs a lot to test a plane    

C) some problems are found with the plane   

D) many people will die in a plane accident   


  55. A wind tunnel can be used to find out ______.  

A) how fast a plane can rise   

B) how smooth a plane’s surface is    

C) if a plane can land in a very strong wind   

D) if a plane will drop when flying at a low height   

第四部分：写作   第一节：短文改错 　　此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个勾(√); 如有错误(每行只有一个错误), 则按下列情况改正:     多一个词: 把多余的词用斜线（\）划掉, 在该行右边横线上写出该词,并也用斜线划掉。 　　缺一个词: 在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。 　　错一个词: 在错的词下划一横线,在该行右边横线上写出改正后的词。 注意: 原行没有错的不要改。

A language is always changed. In a society　　　　　　　56._________ which life continues year after year without obvious changes,　　　　57._________ even the change doesn’t change much, too. The earliest known10 　　　　58._________ languages have difficult grammar but a small limit vocabulary(词汇).　　　59._________ Over the centuries, the grammar changed and the vocabulary grown.　　　60._________ For an example, the English and Spanish who 　　　　　　　61._________ came to America during the 16th and the 17th century 　　　　　　62._________ gave the name to all the plants and animals. 　　　　　　　　63._________ In this way, hundreds new words and expressions　　　　　　　64._________ and idioms introduced into English and Spanish vocabularies. 　　　　65._________

第二节：书面表达 
　　Mr Luois Alexander 应邀来渝讲学，并到你校参观，和一些学生座谈。现由你（张渝）主持座谈会，代表你校学生用英语致词欢迎词。欢迎词应包括以下内容要点：
1. 对来访客人表示热烈欢迎。
2. 介绍Mr Luois Alexander(英国著名语言学家)。
3. 他的著作极其丰富，包括大家熟知的《新概念英语》（New Concept¹¹ English）跟我学（Follow Me）等。
4. 来渝目的：讲学、进一步了解中国中学生英语学习的情况。
5. 请Mr Alexander 作指导，提建议。
6. 请大家就英语学习方面的问题向他提问。
注意：1.行文连贯、通顺，字数100词左右。
2.行文不必写出发言人的学校及个人姓名。如要写出，须用规定的人名及校名。
3.生词：语言学家—linguist;讲学—give a lecture